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Electronic Superstructures Observed by Scanning Tunneling Microscopy on Graphene Sheet in Vicinity of Nano-Defects of Ir(111) Substrate

Published online by Cambridge University Press:  03 March 2011

Z. Waqar
Affiliation:
A. F. Ioffe, Physical-Technical Institute, Russian Academy of Science, 26 Politekhnicheskaya, 194021 St. Petersburg, Russia
I.V. Makarenko
Affiliation:
A. F. Ioffe, Physical-Technical Institute, Russian Academy of Science, 26 Politekhnicheskaya, 194021 St. Petersburg, Russia
A.N. Titkov
Affiliation:
A. F. Ioffe, Physical-Technical Institute, Russian Academy of Science, 26 Politekhnicheskaya, 194021 St. Petersburg, Russia
N.R. Gall
Affiliation:
A. F. Ioffe, Physical-Technical Institute, Russian Academy of Science, 26 Politekhnicheskaya, 194021 St. Petersburg, Russia
E.V. Rutkov
Affiliation:
A. F. Ioffe, Physical-Technical Institute, Russian Academy of Science, 26 Politekhnicheskaya, 194021 St. Petersburg, Russia
A.Ya. Tontegode
Affiliation:
A. F. Ioffe, Physical-Technical Institute, Russian Academy of Science, 26 Politekhnicheskaya, 194021 St. Petersburg, Russia
Ph. Dumas
Affiliation:
A. F. Ioffe, Physical-Technical Institute, Russian Academy of Science, 26 Politekhnicheskaya, 194021 St. Petersburg, Russia
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Abstract

Two-dimensional electronic and atomic superstructures (SS) on monolayer graphite (graphene) grown on a clean Ir(111) surface were observed near substrate nano-defect sites by scanning tunneling microscopy. These SS were found rotated 30° with respect to the undistorted areas (away from defects sites) of the graphene layer with a periodicity of and a(a = 2.46 Å)decay over a distance of few nanometers away from the defects. The observed SS were not due to real surface reconstruction, rather they just had an electronic nature.

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Articles
Copyright
Copyright © Materials Research Society 2004

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References

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